Contributed by alert reader Rick Vestal. Independently verified by me. At least, the several Koosh products that I checked out at the toy store all had it. (If anyone knows if OddzOn -- the makers of Koosh stuff -- has a web site, I'd be glad to hear about it. Last time I looked at www.oddzon.com, it was just a "This page under construction" page on an ISP. No indication that it actually belonged to OddzOn Products.)